Added three `setDataSource` APIs in `MediaExtractorCompat`:
- `setDataSource(Context context, Uri uri, @Nullable Map<String, String> headers)` to set data source with a content URI and optional headers.
- `setDataSource(String path)` to set data source using a file path or HTTP URL.
- `setDataSource(String path, @Nullable Map<String, String> headers)` to set data source using a file path or HTTP URL with optional headers.
PiperOrigin-RevId: 657563973
